Well, where I ordered is supposedly one of the most well-known suppliers of RC's and has a lot of good reviews through google. It does say on their site they ship in discrete packaging (which could I guess mean "deceptive" packaging)?
I snorted the smallest amount of dust possible I could collect with tweezers and noticed the distinct acetone taste and mild burn/sting others have reported here, so I'm assuming it is O-DMT and that the supplier is overly cautious/deceptive about packaging. It's kind of an off-white, clumpy powder. I just expected an unmarked plastic bag filled with substance.
I'm still going to approach this as cautiously as I can since I have no access to lab testing, but this is definitely one instance I wish source discussion was allowed as it relates directly to harm reduction. If what I have is some fake or possibly harmful substance, I may not find out until it's too late.